TECHNICAL FIELD
[0001] Embodiments of the present invention relate to the field of communications technologies,
and in particular, to an uplink control information sending method, an uplink control
information receiving method, an apparatus, and a system.
BACKGROUND
[0002] In a Long Term Evolution (Long Term Evolution, LTE for short) system, an access network
device sends downlink data to a same terminal device on at least one of multiple carriers.
For downlink data on each carrier, the terminal device separately performs acknowledgment
and generates hybrid automatic repeat request-acknowledgment HARQ-ACK information.
If acknowledgment succeeds, the terminal device returns acknowledgment information
ACK. If acknowledgment fails, the terminal device returns negative acknowledgment
information NACK. The terminal device sends each piece of acknowledgment information
to the access network device on a same uplink channel. In addition, the access network
device sends a reference signal to the terminal device on each carrier, so that the
terminal device detects the reference signal on each carrier to obtain channel state
information (Channel State Information, CSI for short) corresponding to each carrier.
[0003] In the prior art, the access network device indicates, by using preconfigured information,
a subframe location (which is determined by a subframe offset for feeding back CSI
and a period for feeding back the CSI) at which the terminal device feeds back periodic
CSI and specific content of the periodic CSI fed back at each location for feeding
back the periodic CSI. Herein, the acknowledgment information and/or the CSI are all
referred to as uplink control information (Uplink Control Information, UCI for short).
Therefore, UCI fed back by the terminal device to the access network device on the
uplink channel in some subframes includes only acknowledgment information or includes
only periodic CSI information and CSI. Because a quantity of bits of CSI fed back
by the terminal device in each subframe for feeding back the periodic CSI is not constant,
quantities of bits of UCI fed back by the terminal device in different subframes are
different. The access network device allocates multiple uplink channels to the terminal
device in advance, and before the terminal device feeds back UCI, the access network
device sends dynamic indication information to the terminal device. The dynamic indication
information specifies an uplink channel on which the terminal device feeds back the
UCI.
[0004] As a quantity of uplink channels allocated by the access network device to the terminal
device in advance increases continuously, a quantity of bits of the dynamic indication
information delivered by the access network device increases continuously, leading
to relatively large consumption of downlink channel resources. In addition, a capacity
of the uplink channel specified by the access network device for the terminal device
by using the dynamic indication information does not meet a size of the UCI. As a
result, utilization of the uplink channel is relatively low or UCI bits are discarded.
[0005] CN103209483A1 discloses a method for transmitting uplink control information. In the method, there
are two semi-statistically configured resource groups; UE receives a physical downlink
control channel, wherein the physical downlink control channel comprises indication
information, and the indication information is used to indicate a physical uplink
control channel resource used to transmit uplink control information; the UE selects
a resource group according to whether periodic channel state information (CSI) is
included in the to-be-transmitted uplink control information (UCI), e.g. if CSI is
included, a first resource group is selected, else, a second group is selected; and
the UE sends the UCI using the indicated physical uplink control channel resource
of the selected resource group.
[0006] CN102378373A discloses a method for transmitting uplink control information. In the method, a
base station allocates N uplink control channel resources semi-statistically by higher
layer signaling to UE, and then the base station indicates in a physical downlink
control channel (PDCCH), the UE an index of an uplink control channel resource to
transmit uplink control information, wherein the indicated uplink control channel
resource belongs to the N uplink control channel resources.
[0007] CN102355325A discloses a method for mapping physical uplink control channel (PUCCH) resources.
In the method, the base station configures at least one PUCCH resource for each enhanced-
physical downlink control channel (E-PDCCH) cluster, and the UE transmits uplink control
information (UCI) on the PUCCH resource corresponding to an E-PDCCH cluster where
there is PDCCH transmission.
[0008] 3GPP TSG RAN WG1 #61, R1-103002 discloses a method for PUCCH HARQ-ACK resource mapping
in response to PDSCH transmissions with Carrier Aggregation (CA). in the method, a
HARQ-ACK Resource Index (HRI) IE in the DL scheduling assignments with CA is introduced
to explicitly/implicitly adjust the HARQ-ACK resource.
[0009] WO 2014/121511 A1 discloses an information sending method, an information receiving method and a device
thereof, in order to solve the problem of how to send or receive a CSI-RS so as to
reduce interference. The method comprises: a UE acquiring first configuration information
about a common CSI-RS, the first configuration information being used for indicating
the transmission of a first resource unit set of the common CSI-RS; the UE determining
to transmit at least one first resource of a common channel, the first resource comprising
the first resource unit set of the common CSI-RS; and the UE receiving the common
channel over the first resource bypassing the first resource unit set. The device
comprises a base station or a user equipment. The technical solution can avoid the
interference of a common CSI-RS to a common channel, and by means of first configuration
information about the common CSI-RS, can expand CSI-RS resources.
[0010] US8797985B2 discloses that A new uplink control channel capability is introduced to enable a
mobile terminal to simultaneously report to the radio network multiple packet receipt
status bits and channel-condition bits. In particular, if a mobile terminal is configured
with channel selection (e.g., with PUCCH format 1b) and is configured to report or
is capable of reporting periodic CSI and ACK/NACK bits together, then the mobile terminal
can use one or more out of a set of preconfigured uplink control resources and transmit
(1140) a PUCCH using a new format in this resource. The particular uplink control
channel resource the mobile terminal uses from this set is selected (1120) based on
an information field contained in a downlink control message corresponding to the
ACKed or NACKed data transmission, for example, such as the Transmit Power Control
(TPC) command in a downlink assignment message.
[0011] 3GPP STANDARD; 3GPP TS 36.213, V12.3.0 discloses a method of preconfigured channel
resource sets (according to formats 1, la,2,2a,2b, 3etc) in order to transmit UCI
in the PUCCH. 3GPP STANDARD; 3GPP TS 36.211, V12.6.0 discloses different UCI formats
with different number of bits.
SUMMARY
[0012] Embodiments of the present invention provide an uplink control information sending
method, an uplink control information receiving method, an apparatus, and a system,
so as to reduce consumption of downlink channel resources, thereby increasing utilization
of an uplink channel or preventing losses of UCI bits.
[0013] The invention is defined in the appended claims. References to embodiments which
do not fall under the scope of the claims are to be understood as examples useful
for understanding the invention.
[0014] A first aspect provides an uplink control information sending method, including:
receiving, by a terminal device, channel indication information from an access network
device on a physical control channel;
determining, by the terminal device, a size of uplink control information, UCI, wherein
the UCI includes channel state information, CSI; and
determining, by the terminal device, a channel resource set that is of channel resource
sets and that matches the size of the UCI as a first channel resource set, where N is a positive integer greater than or equal to 2, the N channel resource sets are preconfigured by the access network device for the terminal
device, and each of the N channel resource sets includes at least two channel resources;
determining, by the terminal device, a channel resource that is in the channel resource
set and that is indicated by the channel indication information; and
sending, by the terminal device, UCI to the access network device on the channel resource.
[0015] With reference to the first possible implementation of the first aspect, in a second
possible implementation of the first aspect, the type of the UCI includes a first
type and a second type, and
N = 2 , where
a first type of UCI includes channel state information CSI and hybrid automatic repeat
request-acknowledgment HARQ-ACK information, and a channel resource included in one
of the
N channel resource sets is used to send the first type of UCI; and
a second type of UCI includes HARQ-ACK information but not CSI, and a channel resource
included in the other of the
N channel resource sets is used to send the second type of UCI.
[0016] With reference to the first aspect, in a third possible implementation of the first
aspect, before the determining, by the terminal device, a channel resource set of
N channel resource sets as a first channel resource set, the method further includes:
determining, by the terminal device, a size of the UCI; and
the determining, by the terminal device, a channel resource set of N channel resource sets as a first channel resource set includes:
determining, by the terminal device, the channel resource set that is of the N channel resource sets and that matches the size K of the UCI as the first channel
resource set.
[0017] With reference to the third possible implementation of the first aspect, in a fourth
possible implementation of the first aspect, the determining, by the terminal device,
the channel resource set that is of the
N channel resource sets and that matches the size K of the UCI as the first channel
resource set includes:
determining, by the terminal device, a capacity range corresponding to each of the
N channel resource sets; and
determining, by the terminal device, a channel resource set of the N channel resource sets as the first channel resource set, so that the size K of the
UCI meets Rmin ≤ K ≤ Rmax, where a capacity range of the channel resource set is [Rmin, Rmax], Rmin is a minimum value of a capacity of the channel resource set, and Rmax is a maximum value of the capacity of the channel resource set.
[0018] With reference to any one of the first aspect or the first to the fourth possible
implementations of the first aspect, in a fifth possible implementation of the first
aspect, quantities of channel resources included in the
N channel resource sets are the same.
[0019] With reference to any one of the first aspect or the first to the fifth possible
implementations of the first aspect, in a sixth possible implementation of the first
aspect, at least one of the
N channel resource sets includes at least two channel resources having different formats.
[0020] With reference to any one of the first aspect or the first to the fifth possible
implementations of the first aspect, in a seventh possible implementation of the first
aspect, at least one of the
N channel resource sets includes at least two channel resources having a same format
but different channel capacities.
[0021] With reference to any one of the first aspect or the first to the seventh possible
implementations of the first aspect, in an eighth possible implementation of the first
aspect, before the receiving, by a terminal device, channel indication information
from an access network device on a physical control channel, the method further includes:
receiving, by the terminal device, configuration information of the
N channel resource sets from the access network device by using higher layer signaling,
where configuration information of the N channel resource sets corresponding to the
different terminal devices is different.
[0022] A second aspect provides an uplink control information receiving method, including:
sending, by an access network device, channel indication information to a terminal
device on a physical control channel;
preconfiguring, by the access network device, N channel resource sets for the terminal device, so that the terminal device determines
a channel resource set of the N channel resource sets that matches a size of uplink control information, UCI, as
a first channel resource set, and determines a channel resource that is in the first
channel resource set and that is indicated by the channel indication information,
where N is a positive integer greater than or equal to 2, and each of the N channel resource sets includes at least two channel resources; and
receiving, by the access network device, the UCI sent by the terminal device on the
channel resource, wherein the UCI includes channel state information, CSI.
[0023] With reference to the second aspect, in a first possible implementation of the second
aspect, quantities of channel resources included in the
N channel resource sets are the same.
[0024] With reference to the second aspect, in a second possible implementation of the second
aspect, at least one of the
N channel resource sets includes at least two channel resources having different formats.
[0025] With reference to the second aspect, in a third possible implementation of the second
aspect, at least one of the
N channel resource sets includes at least two channel resources having a same format
but different channel capacities.
[0026] With reference to any one of the second aspect or the first to the third possible
implementations of the second aspect, in a fourth possible implementation of the second
aspect, before the sending, by an access network device, channel indication information
to a terminal device on a physical control channel, the method further includes:
sending, by the access network device, configuration information of the
N channel resource sets to the terminal device by using higher layer signaling, where
configuration information of the N channel resource sets corresponding to the different
terminal devices is different.
[0027] A third aspect provides an uplink control information sending method, including:
receiving, by a terminal device, channel indication information from an access network
device on a physical control channel;
determining, by the terminal device, a first channel resource of N channel resources according to the channel indication information, where N is a positive integer greater than or equal to 2, and the N channel resources are preconfigured by the access network device for the terminal
device;
increasing or decreasing, by the terminal device, the first channel resource to obtain
a second channel resource; and
sending, by the terminal device, uplink control information UCI to the access network
device on the second channel resource.
[0028] With reference to the third aspect, in a first possible implementation of the third
aspect, the
N channel resources correspond to different channel capacities;
before the increasing or decreasing, by the terminal device, the first channel resource
to obtain a second channel resource, the method further includes: determining, by
the terminal device, a size of the UCI; and
the increasing or decreasing, by the terminal device, the first channel resource to
obtain a second channel resource includes:
if a channel capacity corresponding to the first channel resource is greater than
the size of the UCI, decreasing, by the terminal device, the first channel resource
to obtain the second channel resource; or
if a channel capacity corresponding to the first channel resource is less than the
size of the UCI, increasing, by the terminal device, the first channel resource to
obtain the second channel resource.
[0029] With reference to the first possible implementation of the third aspect, in a second
possible implementation of the third aspect, the decreasing, by the terminal device,
the first channel resource to obtain the second channel resource includes:
decreasing, by the terminal device, the channel capacity of the first channel resource
by
k basic channel elements to obtain the second channel resource, so that the size
Ra of the UCI meets
Rb-(
k+1)
R0 <
Ra ≤
Rb - kR0, where
Rb indicates the channel capacity of the first channel resource, and
R0 indicates a size of the basic channel element.
[0030] With reference to the second possible implementation of the third aspect, in a third
possible implementation of the third aspect, a subcarrier whose frequency is the highest
in the
k basic channel elements is adjacent to a subcarrier whose frequency is the lowest
in the first channel resource; or
a subcarrier whose frequency is the lowest in the
k basic channel elements is adjacent to a subcarrier whose frequency is the highest
in the first channel resource.
[0031] With reference to the first possible implementation of the third aspect, in a fourth
possible implementation of the third aspect, the increasing, by the terminal device,
the first channel resource to obtain the second channel resource includes:
increasing, by the terminal device, the channel capacity of the first channel resource
by
k basic channel elements, so that the size
Ra of the UCI meets
Rb +(
k-1)
R0 <
Ra ≤Rb +
kR0, where
Rb indicates the channel capacity of the first channel resource, and
R0 indicates a size of the basic channel element.
[0032] With reference to the fourth possible implementation of the third aspect, in a fifth
possible implementation of the third aspect, a subcarrier whose frequency is the highest
in the
k basic channel elements is adjacent to a subcarrier whose frequency is the lowest
in the first channel resource; or
a subcarrier whose frequency is the lowest in the
k basic channel elements is adjacent to a subcarrier whose frequency is the highest
in the first channel resource.
[0033] With reference to any one of the third aspect or the first to the fifth possible
implementations of the third aspect, in a sixth possible implementation of the third
aspect, the UCI includes at least one of HARQ-ACK information of the terminal device
for received downlink data or channel state information CSI generated by the terminal
device.
[0034] With reference to any one of the third aspect or the first to the sixth possible
implementations of the third aspect, in a seventh possible implementation of the third
aspect, before the receiving, by a terminal device, channel indication information
from an access network device on a physical control channel, the method further includes:
receiving, by the terminal device, configuration information of the
N channel resources from the access network device by using higher layer signaling,
where configuration information of the N channel resource sets corresponding to the
different terminal devices is different.
[0035] A fourth aspect provides an uplink control information receiving method, including:
sending, by an access network device, channel indication information to a terminal
device on a physical control channel, so that the terminal device determines a first
channel resource of N channel resources according to the channel indication information, and increases
or decreases the first channel resource to obtain a second channel resource, where
N is a positive integer greater than or equal to 2, and the N channel resources are preconfigured by the access network device for the terminal
device; and
receiving, by the access network device, uplink control information UCI sent by the
terminal device on the second channel resource.
[0036] With reference to the fourth aspect, in a first possible implementation of the fourth
aspect, the UCI includes at least one of HARQ-ACK information of the terminal device
for received downlink data or channel state information CSI generated by the terminal
device.
[0037] With reference to the fourth aspect or the first possible implementation of the fourth
aspect, in a second possible implementation of the fourth aspect, before the sending,
by an access network device, channel indication information to a terminal device on
a physical control channel, the method further includes:
sending, by the access network device, configuration information of the
N channel resources to the terminal device by using higher layer signaling, where configuration
information of the N channel resource sets corresponding to the different terminal
devices is different.
[0038] A fifth aspect provides a terminal device, including:
a first receiving unit, configured to receive channel indication information from
an access network device on a physical control channel;
a first processing unit, configured to: determine a channel resource set of N channel resource sets as a first channel resource set, where N is a positive integer greater than or equal to 2, the N channel resource sets are preconfigured by the access network device for the terminal
device, and each of the N channel resource sets includes at least two channel resources; and determine a channel
resource that is in the first channel resource set and that is indicated by the channel
indication information; and
a first sending unit, configured to send uplink control information UCI to the access
network device on the channel resource.
[0039] With reference to the fifth aspect, in a first possible implementation of the fifth
aspect, the first processing unit is further configured to determine a type of the
UCI; and
the first processing unit is specifically configured to determine the channel resource
set that is of the
N channel resource sets and that matches the type of the UCI as the first channel resource
set.
[0040] With reference to the first possible implementation of the fifth aspect, in a second
possible implementation of the fifth aspect, the type of the UCI includes a first
type and a second type, and
N = 2, where
a first type of UCI includes channel state information CSI and hybrid automatic repeat
request-acknowledgment HARQ-ACK information, and a channel resource included in one
of the
N channel resource sets is used to send the first type of UCI; and
a second type of UCI includes HARQ-ACK information but not CSI, and a channel resource
included in the other of the
N channel resource sets is used to send the second type of UCI.
[0041] With reference to the fifth aspect, in a third possible implementation of the fifth
aspect, the first processing unit is further configured to determine a size of the
UCI; and
the first processing unit is specifically configured to determine the channel resource
set that is of the
N channel resource sets and that matches the size K of the UCI as the first channel
resource set.
[0042] With reference to the third possible implementation of the fifth aspect, in a fourth
possible implementation of the fifth aspect, the first processing unit is specifically
configured to: determine a capacity range corresponding to each of the
N channel resource sets; and determine a channel resource set of the
N channel resource sets as the first channel resource set, so that the size K of the
UCI meets
Rmin ≤
K ≤
Rmax, where a capacity range of the channel resource set is [
Rmin,
Rmax],
Rmin is a minimum value of a capacity of the channel resource set, and
Rmax is a maximum value of the capacity of the channel resource set.
[0043] With reference to any one of the fifth aspect or the first to the fourth possible
implementations of the fifth aspect, in a fifth possible implementation of the fifth
aspect, quantities of channel resources included in the
N channel resource sets are the same.
[0044] With reference to any one of the fifth aspect or the first to the fifth possible
implementations of the fifth aspect, in a sixth possible implementation of the fifth
aspect, at least one of the
N channel resource sets includes at least two channel resources having different formats.
[0045] With reference to any one of the fifth aspect or the first to the fifth possible
implementations of the fifth aspect, in a seventh possible implementation of the fifth
aspect, at least one of the
N channel resource sets includes at least two channel resources having a same format
but different channel capacities.
[0046] With reference to any one of the fifth aspect or the first to the seventh possible
implementations of the fifth aspect, in an eighth possible implementation of the fifth
aspect, the first receiving unit is further configured to receive configuration information
of the
N channel resource sets from the access network device by using higher layer signaling,
where configuration information of the N channel resource sets corresponding to the
different terminal devices is different.
[0047] A sixth aspect provides an access network device, including:
a second sending unit, configured to send channel indication information to a terminal
device on a physical control channel;
a second processing unit, configured to preconfigure N channel resource sets for the terminal device, so that the terminal device determines
a channel resource set of the N channel resource sets as a first channel resource set, and determines a channel resource
that is in the first channel resource set and that is indicated by the channel indication
information, where N is a positive integer greater than or equal to 2, and each of the N channel resource sets includes at least two channel resources; and
a second receiving unit, configured to receive uplink control information UCI sent
by the terminal device on the channel resource.
[0048] With reference to the sixth aspect, in a first possible implementation of the sixth
aspect, quantities of channel resources included in the
N channel resource sets are the same.
[0049] With reference to the sixth aspect, in a second possible implementation of the sixth
aspect, at least one of the
N channel resource sets includes at least two channel resources having different formats.
[0050] With reference to the sixth aspect, in a third possible implementation of the sixth
aspect, at least one of the
N channel resource sets includes at least two channel resources having a same format
but different channel capacities.
[0051] With reference to any one of the sixth aspect or the first to the third possible
implementations of the sixth aspect, in a fourth possible implementation of the sixth
aspect, the second sending unit is further configured to send configuration information
of the
N channel resource sets to the terminal device by using higher layer signaling, where
configuration information of the N channel resource sets corresponding to the different
terminal devices is different.
[0052] A seventh aspect provides a terminal device, including:
a third receiving unit, configured to receive channel indication information from
an access network device on a physical control channel;
a third processing unit, configured to: determine a first channel resource of N channel resources according to the channel indication information, where N is a positive integer greater than or equal to 2, and the N channel resources are preconfigured by the access network device for the terminal
device; and increase or decrease the first channel resource to obtain a second channel
resource; and
a third sending unit, configured to send uplink control information UCI to the access
network device on the second channel resource.
[0053] With reference to the seventh aspect, in a first possible implementation of the seventh
aspect, the
N channel resources correspond to different channel capacities;
the third processing unit is further configured to determine a size of the UCI; and
the third processing unit is specifically configured to: if a channel capacity corresponding
to the first channel resource is greater than the size of the UCI, decrease the first
channel resource to obtain the second channel resource; or if a channel capacity corresponding
to the first channel resource is less than the size of the UCI, increase the first
channel resource to obtain the second channel resource.
[0054] With reference to the first possible implementation of the seventh aspect, in a second
possible implementation of the seventh aspect, the third processing unit is specifically
configured to decrease the channel capacity of the first channel resource by
k basic channel elements to obtain the second channel resource, so that the size
Ra of the UCI meets
Rb -(
k+1)
R0 <
Ra ≤
Rb - kR0, where
Rb indicates the channel capacity of the first channel resource, and
R0 indicates a size of the basic channel element.
[0055] With reference to the second possible implementation of the seventh aspect, in a
third possible implementation of the seventh aspect, a subcarrier whose frequency
is the highest in the
k basic channel elements is adjacent to a subcarrier whose frequency is the lowest
in the first channel resource; or
a subcarrier whose frequency is the lowest in the
k basic channel elements is adjacent to a subcarrier whose frequency is the highest
in the first channel resource.
[0056] With reference to the first possible implementation of the seventh aspect, in a fourth
possible implementation of the seventh aspect, the third processing unit is specifically
configured to increase the channel capacity of the first channel resource by
k basic channel elements, so that the size
Ra of the UCI meets
Rb +(
k-1)
R0 <
Ra ≤
Rb +
kR0, where
Rb indicates the channel capacity of the first channel resource, and
R0 indicates a size of the basic channel element.
[0057] With reference to the fourth possible implementation of the seventh aspect, in a
fifth possible implementation of the seventh aspect, a subcarrier whose frequency
is the highest in the
k basic channel elements is adjacent to a subcarrier whose frequency is the lowest
in the first channel resource; or
a subcarrier whose frequency is the lowest in the
k basic channel elements is adjacent to a subcarrier whose frequency is the highest
in the first channel resource.
[0058] With reference to any one of the seventh aspect or the first to the fifth possible
implementations of the seventh aspect, in a sixth possible implementation of the seventh
aspect, the UCI includes at least one of HARQ-ACK information of the terminal device
for received downlink data or channel state information CSI generated by the terminal
device.
[0059] With reference to any one of the seventh aspect or the first to the sixth possible
implementations of the seventh aspect, in a seventh possible implementation of the
seventh aspect, the third receiving unit is further configured to receive configuration
information of the
N channel resources from the access network device by using higher layer signaling,
where configuration information of the N channel resource sets corresponding to the
different terminal devices is different.
[0060] An eighth aspect provides an access network device, including:
a fourth sending unit, configured to send channel indication information to a terminal
device on a physical control channel, so that the terminal device determines a first
channel resource of N channel resources according to the channel indication information, and increases
or decreases the first channel resource to obtain a second channel resource, where
N is a positive integer greater than or equal to 2, and the N channel resources are preconfigured by the access network device for the terminal
device; and
a fourth receiving unit, configured to receive uplink control information UCI sent
by the terminal device on the second channel resource.
[0061] With reference to the eighth aspect, in a first possible implementation of the eighth
aspect, the UCI includes at least one of HARQ-ACK information of the terminal device
for received downlink data or channel state information CSI generated by the terminal
device.
[0062] With reference to the eighth aspect or the first possible implementation of the eighth
aspect, in a second possible implementation of the eighth aspect, the fourth sending
unit is further configured to send configuration information of the
N channel resources to the terminal device by using higher layer signaling, where configuration
information of the N channel resource sets corresponding to the different terminal
devices is different.
[0063] A ninth aspect provides an uplink control information sending and receiving system,
including the terminal device according to any one of the fifth aspect or the first
to the eighth possible implementations of the fifth aspect, and the access network
device according to any one of the sixth aspect or the first to the fourth possible
implementations of the sixth aspect.
[0064] A tenth aspect provides an uplink control information sending and receiving system,
including the terminal device according to any one of the seventh aspect or the first
to the seventh possible implementations of the seventh aspect, and the access network
device according to any one of the eighth aspect or the first or the second possible
implementation of the eighth aspect.
[0065] According to the uplink control information sending method, the uplink control information
receiving method, and the apparatus that are provided in the embodiments of the present
invention, the access network device sends the configuration information of the at
least two channel resource sets to the terminal device, where each channel resource
set includes at least two channel resources. This is equivalent to that all channel
resources allocated by the access network device to the terminal device are grouped,
and each group is equivalent to one channel resource set. The terminal device first
determines the first channel resource set of the multiple channel resource sets, and
then determines the channel resource in the first channel resource set according to
the channel indication information. Different channel resources may be determined
at different times in a subframe according to same channel indication information,
while in the prior art, only one channel resource can be determined at different times
in a subframe according to same channel indication information. As a quantity of channel
resources increases continuously, a quantity of bits that need to be added to the
channel indication information in the embodiments of the present invention is less
than that in the prior art, reducing consumption of downlink channel resources by
the channel indication information in a delivery process.
BRIEF DESCRIPTION OF DRAWINGS
[0066] To describe the technical solutions in the embodiments of the present invention or
in the prior art more clearly, the following briefly describes the accompanying drawings
required for describing the embodiments or the prior art. Apparently, the accompanying
drawings in the following description show some embodiments of the present invention,
and persons of ordinary skill in the art may still derive other drawings from these
accompanying drawings without creative efforts.
FIG. 1 is a flowchart of an uplink control information sending method according to
an embodiment of the present invention;
FIG. 2 is a schematic diagram of a channel resource;
FIG. 3 is a schematic diagram of a channel resource according to another embodiment
of the present invention;
FIG. 4 is a flowchart of an uplink control information receiving method according
to another embodiment of the present invention;
FIG. 5 is a flowchart of an uplink control information sending method;
FIG. 6 is a schematic diagram of a channel resource;
FIG. 7 is a schematic diagram of a channel resource;
FIG. 8 is a schematic diagram of a channel resource;
FIG. 9 is a schematic diagram of a channel resource;
FIG. 10 is a flowchart of an uplink control information receiving method;
FIG. 11 is a structural diagram of a terminal device according to an embodiment of
the present invention;
FIG. 12 is a structural diagram of an access network device according to an embodiment
of the present invention;
FIG. 13 is a structural diagram of a terminal device;
FIG. 14 is a structural diagram of an access network device;
FIG. 15 is a structural diagram of an uplink control information sending and receiving
system according to an embodiment of the present invention;
FIG. 16 is a structural diagram of an uplink control information sending and receiving
system; and
FIG. 17 is a schematic diagram of a format of a channel resource according to an embodiment
of the present invention.
DESCRIPTION OF EMBODIMENTS
[0067] To make the objectives, technical solutions, and advantages of the embodiments of
the present invention clearer, the following clearly and completely describes the
technical solutions in the embodiments of the present invention with reference to
the accompanying drawings in the embodiments of the present invention.
[0068] FIG. 1 is a flowchart of an uplink control information sending method according to
an embodiment of the present invention. In this embodiment of the present invention,
the uplink control information sending method is provided for a case in which as a
quantity of uplink channels increases continuously, a quantity of bits of channel
indication information delivered by an access network device increases continuously,
leading to relatively large consumption of downlink channel resources. Specific steps
of the method are as follows.
[0069] Step S101: A terminal device receives channel indication information from an access
network device on a physical control channel.
[0070] This embodiment of the present invention relates to an access network device and
a terminal device in an LTE system. The access network device is specifically a base
station, and the access network device sends downlink data to a same terminal device
by using at least one of multiple carriers. For downlink data on each carrier, the
terminal device separately performs acknowledgment and generates HARQ-ACK information.
In addition, the access network device sends a reference signal to the terminal device
by using each carrier. The terminal device obtains channel state information CSI corresponding
to each carrier by detecting the reference signal on each carrier. The access network
device feeds back uplink control information UCI to the access network device on an
uplink channel. The UCI includes the channel state information and may include the
HARQ-ACK information.
[0071] Before the access network device feeds back the uplink control information UCI to
the access network device on the uplink channel, the terminal device receives, on
the physical control channel, the channel indication information sent by the access
network device. The physical control channel is specifically a physical downlink control
channel (Physical Downlink Control Channel, PDCCH for short) and an enhanced physical
downlink control channel (Enhanced Physical Downlink Control Channel, EPDCCH for short).
Information borne on the physical control channel is dynamically configured information.
That is, the channel indication information is borne on the physical control channel
as dynamically configured information, and is sent by the access network device to
the terminal device.
[0072] Step S102: The terminal device determines a channel resource set of
N channel resource sets as a first channel resource set, where
N is a positive integer greater than or equal to 2, the
N channel resource sets are preconfigured by the access network device for the terminal
device, and each of the
N channel resource sets includes at least two channel resources.
[0073] In this embodiment of the present invention, step S101 may be performed first and
then step S102 may be performed, or step S102 may be performed first and then step
S101 may be performed. The access network device preconfigures the
N channel resource sets for the terminal device, where
N is a positive integer greater than or equal to 2, and each of the
N channel resource sets includes at least two channel resources. The terminal device
determines a channel resource set of the
N channel resource sets as the first channel resource set. Specifically, determining
the channel resource set of the
N channel resource sets as the first channel resource set may be according to a type
or size of the UCI fed back by the terminal device to the access network device. The
type of the UCI may be specifically distinguished by using specific content included
in the UCI, and the size of the UCI may be specifically measured by using a quantity
of bits of the UCI or an amount of UCI.
[0074] Step S103: The terminal device determines a channel resource that is in the first
channel resource set and that is indicated by the channel indication information.
[0075] After the first channel resource set is determined in step S102, the terminal device
determines the channel resource that is in the first channel resource set and that
is indicated by the channel indication information. Specifically, the channel resource
indicated by the channel indication information is a channel resource in the first
channel resource set. For example, the first channel resource set includes four channel
resources: a channel resource a, a channel resource b, a channel resource c, and a
channel resource d. It is predefined that channel indication information 00 indicates
the channel resource a, channel indication information 01 indicates the channel resource
b, channel indication information 10 indicates the channel resource c, and channel
indication information 11 indicates the channel resource d. According to an indication
of the channel indication information, the channel resource may be determined in the
first channel resource set.
[0076] Step S104: The terminal device sends uplink control information UCI to the access
network device on the channel resource.
[0077] The terminal device sends the uplink control information UCI to the access network
device on the channel resource determined in step S103. That is, the channel resource
is used as an uplink channel to bear the uplink control information UCI, and is used
to send the UCI to the access network device.
[0078] In this embodiment of the present invention, the access network device sends configuration
information of the at least two channel resource sets to the terminal device, where
each channel resource set includes at least two channel resources. This is equivalent
to that all channel resources allocated by the access network device to the terminal
device are grouped, and each group is equivalent to one channel resource set. The
terminal device first determines the first channel resource set of the multiple channel
resource sets, and then determines the channel resource in the first channel resource
set according to the channel indication information. Different channel resources may
be determined at different times in a subframe according to same channel indication
information, while in the prior art, only one channel resource can be determined at
different times in a subframe according to same channel indication information. As
a quantity of channel resources increases continuously, a quantity of bits that need
to be added to the channel indication information in this embodiment of the present
invention is less than that in the prior art, reducing consumption of downlink channel
resources by the channel indication information in a delivery process.
[0079] FIG. 2 is a schematic diagram of a channel resource. This part of the description
relating to FIG. 2 does not describe part of the claimed/present invention. Before
the determining, by the terminal device, a channel resource set of
N channel resource sets as a first channel resource set, the method further includes:
determining, by the terminal device, a type of the UCI. The determining, by the terminal
device, a channel resource set of
N channel resource sets as a first channel resource set includes: determining, by the
terminal device, the channel resource set that is of the
N channel resource sets and that matches the type of the UCI as the first channel resource
set.
[0080] The type of the UCI includes a first type and a second type, and
N = 2. A first type of UCI includes channel state information CSI and hybrid automatic
repeat request-acknowledgment HARQ-ACK information, and a channel resource included
in one of the
N channel resource sets is used to send the first type of UCI. A second type of UCI
includes HARQ-ACK information but not CSI, and a channel resource included in the
other of the
N channel resource sets is used to send the second type of UCI.
[0081] The terminal device determines the type of the UCI. For each downlink carrier for
the terminal device, there is corresponding configuration information for sending
periodic CSI. Specifically, the configuration information includes a sending period
of the periodic CSI and a subframe offset value for sending the periodic CSI in the
period. The UE may determine, by using a sending period of periodic CSI on each downlink
carrier and a subframe offset value for sending the periodic CSI that are configured
by the base station, whether the periodic CSI needs to be sent on at least one carrier
in a current uplink subframe, so as to determine whether a type of UCI that needs
to be fed back in the current uplink subframe is the first type of UCI or the second
type of UCI.
[0082] The first type of UCI includes the channel state information CSI and the hybrid automatic
repeat request-acknowledgment HARQ-ACK information, the second type of UCI includes
HARQ-ACK information but not CSI, and
N = 2. The determining a channel resource set of
N channel resource sets as a first channel resource set may be specifically performed
according to a correspondence between a type of a channel resource set and a type
of UCI. Specifically, the correspondence is implemented in two manners. In a first
manner, when preconfiguring the
N channel resource sets for the terminal device, the access network device predefines
a type that is of UCI and that matches each channel resource set. For example, whether
a channel resource in each channel resource set is used to send the first type of
UCI or the second type of UCI. In a second manner, when preconfiguring the
N channel resource sets for the terminal device, the access network device sends control
signaling to the terminal device, to indicate a type that is of UCI and that matches
each channel resource set. For example, whether a channel resource in each channel
resource set is used to send the first type of UCI or the second type of UCI.
[0083] As shown in FIG. 2, the configuration information includes two channel resource sets:
a channel resource set A and a channel resource set B. Each channel resource set matches
a specific different type of UCI. It is assumed that the channel resource set A matches
the first type of UCI, and the channel resource set B matches the second type of UCI.
That is, each of channel resources such as a channel resource 1-1, a channel resource
1-2, a channel resource 1-3, and a channel resource 1-4 in the channel resource set
A can bear the channel state information CSI and the hybrid automatic repeat request-acknowledgment
HARQ-ACK information, and each of channel resources such as a channel resource 2-1,
a channel resource 2-2, a channel resource 2-3, and a channel resource 2-4 in the
channel resource set B can be used to bear the hybrid automatic repeat request-acknowledgment
HARQ-ACK information but cannot be used to bear the CSI.
[0084] The terminal device determines, according to the type of the UCI, the channel resource
set matching the type of the UCI as the first channel resource set. A specific determining
process is: If the UCI includes the CSI, the terminal device determines the channel
resource set A matching the type of the UCI as the first channel resource set; or
if the UCI does not include the CSI, the terminal device determines the channel resource
set B as the first channel resource set.
[0085] In addition, when the first channel resource set is predefined as the channel resource
set A, the channel indication information 00 indicates the channel resource 1-1, the
channel indication information 01 indicates the channel resource 1-2, the channel
indication information 10 indicates the channel resource 1-3, and the channel indication
information 11 indicates the channel resource 1-4. When the first channel resource
set is predefined as the channel resource set B, the channel indication information
00 indicates the channel resource 2-1, the channel indication information 01 indicates
the channel resource 2-2, the channel indication information 10 indicates the channel
resource 2-3, and the channel indication information 11 indicates the channel resource
2-4.
[0086] If the determined first channel resource set is the channel resource set A, and a
channel resource identifier carried in the channel indication information is a binary
number 01, a channel resource determined by the terminal device in the channel resource
set A according to the channel indication information is the channel resource 1-2.
If the determined first channel resource set is the channel resource set B, a channel
resource determined by the terminal device in the channel resource set B according
to the same channel indication information is the channel resource 2-2. That is, same
channel indication information may be used to indicate different target channel resources
at different times in a subframe.
[0087] This specifically provides the method for determining, by the terminal device according
to the type of the UCI, the channel resource set matching the type of the UCI of the
two channel resource sets as the first channel resource set.
[0088] FIG. 3 is a schematic diagram of a channel resource according to an embodiment of
the present invention. Before the determining, by the terminal device, a channel resource
set of
N channel resource sets as a first channel resource set, the method further includes:
determining, by the terminal device, a size of the UCI. The determining, by the terminal
device, a channel resource set of
N channel resource sets as a first channel resource set includes: determining, by the
terminal device, the channel resource set that is of the
N channel resource sets and that matches the size K of the UCI as the first channel
resource set.
[0089] The terminal device determines the size of the UCI. For each downlink carrier for
the terminal device, there is corresponding configuration information for sending
periodic CSI. Specifically, the configuration information includes a sending period
of the periodic CSI, a subframe offset value for sending the periodic CSI in the period,
a reporting mode of the periodic CSI, and the like. The UE may determine, by using
configuration information that is for periodic CSI on each downlink carrier and that
is configured by the base station, a quantity of bits for reporting the periodic CSI
on each carrier in a current uplink subframe and reported content, so as to determine
a size K of UCI that needs to be fed back in the current uplink subframe.
[0090] The determining, by the terminal device, the channel resource set that is of the
N channel resource sets and that matches the size K of the UCI as the first channel
resource set includes: determining, by the terminal device, a capacity range corresponding
to each of the
N channel resource sets; and determining, by the terminal device, a channel resource
set of the
N channel resource sets as the first channel resource set, so that the size K of the
UCI meets
Rmin ≤
K ≤
Rmax, where a capacity range of the channel resource set is [
Rmin,
Rmax] ,
Rmin is a minimum value of a capacity of the channel resource set, and
Rmax is a maximum value of the capacity of the channel resource set.
[0091] As shown in FIG. 3, the access network device preconfigures four channel resource
sets for the terminal device: a channel resource set A, a channel resource set B,
a channel resource set C, and a channel resource set D. The access network device
sends the configuration information to the terminal device. The configuration information
includes a capacity range corresponding to each of the four channel resource sets,
and the channel resource sets correspond to different capacity ranges. The capacity
range corresponding to each channel resource set refers to a quantity of bits of UCI
that can be sent on channel resources of each channel resource set. For example, a
capacity range corresponding to the channel resource set A is [
R1,min,
R1,max], where
R1,min is a minimum value of a capacity of the channel resource set A, and
R1,max is a maximum value of the capacity of the channel resource set A. Similarly, a capacity
range corresponding to the channel resource set B is [
R2,min,R2,max], a capacity range corresponding to the channel resource set C is [
R3,min,
R3,max], and a capacity range corresponding to the channel resource set D is [
R4,min,
R4,max]. The size of the UCI may be measured by using the quantity of bits of the UCI or
the amount of the UCI. Specifically, each of the foregoing four capacity ranges represents
a range of the quantity of bits. If the quantity K of bits of the UCI meets
R2,min ≤
K ≤
R2,max, that is, the quantity of bits of the UCI is in a range of [
R2,min,
R2,max], the terminal device determines that the first channel resource set is the channel
resource set B.
[0092] Alternatively, the access network device sends the configuration information to the
terminal device. The configuration information includes capacity information corresponding
to each of the four channel resource sets, and the channel resource sets correspond
to different capacity information. For example, as the first channel resource set,
the channel resource set A is corresponding to capacity information
R1, and a channel capacity corresponding to each channel resource in the channel resource
set A is
R1; as the second channel resource set, the channel resource set B is corresponding
to capacity information
R2, and a channel capacity corresponding to each channel resource in the channel resource
set B is
R2 ; as the third channel resource set, the channel resource set C is corresponding
to capacity information
R3, and a channel capacity corresponding to each channel resource in the channel resource
set C is
R3; as the fourth channel resource set, the channel resource set D is corresponding
to capacity information
R4, and a channel capacity corresponding to each channel resource in the channel resource
set D is
R4 ;
R1 <
R2 <
R3 <
R4. If the quantity
Ra of bits of the UCI meets
Ri-1 <
Ra ≤
Ri, where 1 ≤
i ≤ 4, the terminal device determines that the first channel resource set is the
ith channel resource set. Specifically, for example, if the quantity
Ra of bits of the UCI meets
R1 <
Ra ≤
R2, the terminal device determines that the first channel resource set is the second
channel resource set, that is, the channel resource set B.
[0093] In addition, when the first channel resource set is the channel resource set A, the
channel indication information 00 indicates the channel resource 1-1, the channel
indication information 01 indicates the channel resource 1-2, the channel indication
information 10 indicates the channel resource 1-3, and the channel indication information
11 indicates the channel resource 1-4. When the first channel resource set is the
channel resource set B, the channel indication information 00 indicates the channel
resource 2-1, the channel indication information 01 indicates the channel resource
2-2, the channel indication information 10 indicates the channel resource 2-3, and
the channel indication information 11 indicates the channel resource 2-4. When the
first channel resource set is the channel resource set C, the channel indication information
00 indicates a channel resource 3-1, the channel indication information 01 indicates
a channel resource 3-2, the channel indication information 10 indicates a channel
resource 3-3, and the channel indication information 11 indicates a channel resource
3-4. When the first channel resource set is the channel resource set D, the channel
indication information 00 indicates a channel resource 4-1, the channel indication
information 01 indicates a channel resource 4-2, the channel indication information
10 indicates a channel resource 4-3, and the channel indication information 11 indicates
a channel resource 4-4.
[0094] If the first channel resource set is the channel resource set B, and a channel resource
identifier carried in the channel indication information is a binary number 01, a
channel resource determined by the terminal device in the channel resource set B according
to the channel indication information is the channel resource 2-2. If the first channel
resource set is the channel resource set D, a channel resource determined by the terminal
device in the channel resource set D according to the same channel indication information
is the channel resource 4-2. That is, same channel indication information may be used
to indicate different channel resources at different times in a subframe.
[0095] In this embodiment of the present invention, quantities of channel resources included
in the
N channel resource sets are the same. As shown in FIG. 2 and FIG. 3, all the channel
resource sets include a same quantity of channel resources. In addition, all the channel
resource sets may alternatively include different quantities of channel resources.
[0096] At least one of the
N channel resource sets includes at least two channel resources having different formats.
A channel resource set includes channel resources having at least two different formats.
For example, the four channel resources in the channel resource set A may have two
formats, three formats, or four formats. FIG. 17 is a schematic diagram of a format
of a channel resource according to an embodiment of the present invention. The format
of the channel resource may include, but is not limited to, the following formats.
[0097] First: physical uplink control channel (Physical Uplink Control Channel, PUCCH for
short) format 3. A symbol obtained after an original bit is channel coded and a symbol
obtained after the original bit is modulated are separately placed in two timeslots
of one subframe. In this way, there are 12 modulated symbols in each timeslot, and
the 12 modulated symbols are placed on 12 consecutive subcarriers on one time-domain
symbol in one timeslot, that is, occupy 12 subcarriers on one time-domain symbol of
one resource block (Resource Block, RB for short). Then, for each timeslot, spreading
is performed by using an orthogonal cover code (Orthogonal Cover Code, OCC for short)
sequence w having a length of 5 in a time domain. One timeslot occupies five time-domain
symbols in one RB. Different UEs may perform code division multiplexing on one RB
by using different OCCs. Two remaining symbols are used to bear a reference signal
(Reference Signal, RS for short). After that, discrete Fourier transform (Discrete
Fourier Transform, DFT for short) precoding and inverse fast Fourier transform (Inverse
Fast Fourier Transform, IFFT) are performed on the spread bit. In the case of a normal
CP, a sending structural diagram of PUCCH format 3 is shown in FIG. 17: In one resource
block, the reference signal is specifically a pilot portion, and a portion other than
the reference signal is a data portion.
[0098] Second: a first format based on PUCCH format 3. The channel resource in PUCCH format
3 is extended to occupy N (N>1) RBs. Using two RBs as an example, 12 subcarriers in
each timeslot are extended to 24 subcarriers in each timeslot. An original bit is
channel coded and scrambled separately, and then obtained bits are modulated. Obtained
results are separately placed on each subcarrier of two RBs in one subframe. Then,
for each timeslot, spreading is performed by using an orthogonal cover code (Orthogonal
Cover Code, OCC for short) sequence w having a length of 5 in a time domain. One timeslot
occupies five time-domain symbols. Two remaining symbols are used to bear a reference
signal (Reference Signal, RS for short). A mapping location of a demodulation reference
signal is the same as that in PUCCH format 3. Then, on each symbol, DFT precoding
in a length of 24 and inverse fast Fourier transform (Inverse Fast Fourier Transform,
IFFT for short) are performed on all spread data in the two RBs. A solution of performing
spreading in 3 RBs or more RBs is similar, provided that extension is performed in
a frequency domain. In addition to RM encoding, original bit information in this format
may also be encoded by using a convolutional code, for example, a tail biting convolutional
code (Tail Biting CC, TBCC for short).
[0099] Third: a second format based on PUCCH format 3. The channel resource occupies N (N>1)
RBs, and a format of each RB is the same as that in PUCCH format 3. Using two RBs
as an example, 12 subcarriers in each timeslot are extended to 24 subcarriers in each
timeslot. An original bit is channel coded and scrambled separately, and then obtained
bits are modulated. Obtained results are separately placed on each subcarrier of two
RBs in one subframe. Then, for each timeslot, spreading is performed by using an orthogonal
cover code (Orthogonal Cover Code, OCC for short) sequence w having a length of 5
in a time domain. One timeslot occupies five time-domain symbols. Two remaining symbols
are used to bear a reference signal (Reference Signal, RS for short). A mapping location
of a demodulation reference signal is the same as that in PUCCH format 3. Then, on
each symbol, DFT precoding in a length of 12 is separately performed on spread data
in each of the two RBs. A result of each DFT precoding is mapped to inverse fast Fourier
transform IFFT on a carrier in a frequency domain, to complete the IFFT transform.
A solution of performing spreading in 3 RBs or more RBs is similar, provided that
extension is performed in the frequency domain. In addition to RM encoding, original
bit information in this format may also be encoded by using a convolutional code,
for example, a tail biting convolutional code (Tail Biting CC, TBCC for short).
[0100] Fourth: a third format based on PUCCH format 3. The channel resource occupies N (
N≥1) RBs. In a possible manner, a DFT-S-OFDM transmission mode is used in the channel
resource. An original bit is channel coded and modulated, and obtained results are
separately placed on K symbols in one subframe. For each of the K symbols, in a time
domain, spreading is performed by using an orthogonal cover code OCC having a length
of M (
M < 5). Each to-be-sent modulated symbol occupies M time-domain symbols, and each timeslot
includes two symbols used to bear a reference signal (Reference Signal, RS for short).
Then, a mapping location of a demodulation reference signal is the same as that in
PUCCH format 3. DFT precoding and inverse fast Fourier transform (Inverse Fast Fourier
Transform, IFFT for short) are performed on the spread bit. In another possible manner,
a DFT-S-OFDM transmission mode is used in each of the N RBs. An original bit is channel
coded and modulated, and obtained results are separately placed on K symbols in one
subframe. For each of the K symbols, in a time domain, spreading is performed by using
an orthogonal cover code OCC having a length of M (
M < 5). Each to-be-sent modulated symbol occupies M time-domain symbols, and each timeslot
includes two symbols used to bear a reference signal (Reference Signal, RS for short).
A mapping location of a demodulation reference signal is the same as that in PUCCH
format 3. In addition to RM encoding, original bit information in this format may
also be encoded by using a convolutional code, for example, a tail biting convolutional
code (Tail Biting CC, TBCC for short).
[0101] Fourth: a fourth format based on PUCCH format 3. The channel resource occupies N
(
N≥1) RBs. In a possible manner, a DFT-S-OFDM transmission mode is used in the channel
resource. An original bit is channel coded and modulated, and obtained results are
separately placed in two timeslots of one subframe. P (
P≥2) coded and modulated symbols may be placed on each symbol. In a time domain, P
different orthogonal cover codes OCCs each having a length of 5 are separately used
to perform spreading on the P coded and modulated symbols on each symbol, and the
P spread signals are superimposed. Each to-be-sent modulated symbol occupies 5 time-domain
symbols, and each timeslot includes two symbols used to bear a reference signal (Reference
Signal, RS for short). A mapping location of a demodulation reference signal is the
same as that in PUCCH format 3. Then, DFT precoding and inverse fast Fourier transform
(Inverse Fast Fourier Transform, IFFT for short) are performed on the spread bit.
In another possible manner, a DFT-S-OFDM transmission mode is used in each of the
N RBs. An original bit is channel coded and modulated, and obtained results are separately
placed in two timeslots of one subframe. P (
P≥2) coded and modulated symbols may be placed on each symbol. In a time domain, P
different orthogonal cover codes OCCs each having a length of 5 are separately used
to perform spreading on the P coded and modulated symbols on each symbol, and the
P spread signals are superimposed. Each to-be-sent modulated symbol occupies 5 time-domain
symbols, and each timeslot includes two symbols used to bear a reference signal (Reference
Signal, RS for short). A mapping location of a demodulation reference signal is the
same as that in PUCCH format 3. In addition to RM encoding, original bit information
in this format may also be encoded by using a convolutional code, for example, a tail
biting convolutional code (Tail Biting CC, TBCC for short).
[0102] Fifth: a PUSCH-based format. The channel resource occupies
N(
N≥1) RBs. For each PRB, in the case of a normal CP, a demodulation reference signal
occupies an intermediate symbol in each PRB; in the case of an extended CP, a demodulation
reference signal occupies the third symbol in each PRB. After original information
to be fed back is channel coded and modulated, the information is mapped to a location
other than that of a demodulation reference signal in a first PUCCH channel resource,
and then DFT precoding and inverse fast Fourier transform (Inverse Fast Fourier Transform,
IFFT for short) are performed on the information. Original bit information in this
format may be encoded by using a convolutional code, for example, a tail biting convolutional
code (Tail Biting CC, TBCC for short). In the case of the normal CP, a sending structural
diagram of the PUSCH-based format is shown in FIG. 17: In one resource block, the
reference signal is specifically a pilot portion, and a portion other than the reference
signal is a data portion.
[0103] At least one of the
N channel resource sets includes at least two channel resources having a same format
but different channel capacities. For example, the channel resource 1-1 and the channel
resource 1-2 in the channel resource set A have a same format but different channel
capacities.
[0104] The UCI further includes scheduling request information SR.
[0105] Before the receiving, by a terminal device, channel indication information from an
access network device on a physical control channel, the method further includes:
receiving, by the terminal device, configuration information of the
N channel resource sets from the access network device by using higher layer signaling,
where configuration information of the N channel resource sets corresponding to the
different terminal devices is different.
[0106] Before the receiving, by a terminal device, channel indication information from an
access network device on a physical control channel, the terminal device receives
the configuration information sent by the access network device. The configuration
information includes the
N channel resource sets, and configuration information of the N channel resource sets
corresponding to the different terminal devices is different.
[0107] This embodiment of the present invention specifically provides the method for determining,
by the terminal device according to the size of the UCI, the channel resource set
matching the size of the UCI of the at least two channel resource sets as the first
channel resource set.
[0108] FIG. 4 is a flowchart of an uplink control information receiving method according
to another embodiment of the present invention. In this embodiment of the present
invention, the uplink control information sending method is provided for a case in
which as a quantity of uplink channels increases continuously, a quantity of bits
of channel indication information delivered by an access network device increases
continuously, leading to relatively large consumption of downlink channel resources.
Specific steps of the method are as follows:
[0109] Step S401: An access network device sends channel indication information to a terminal
device on a physical control channel.
[0110] This embodiment of the present invention relates to an access network device and
a terminal device in an LTE system. The access network device is specifically a base
station, and the access network device sends downlink data to a same terminal device
by using at least one of multiple carriers. For downlink data on each carrier, the
terminal device separately performs acknowledgment and generates HARQ-ACK information.
In addition, the access network device sends a reference signal to the terminal device
by using each carrier. The terminal device obtains channel state information CSI corresponding
to each carrier by detecting the reference signal on each carrier. The access network
device feeds back uplink control information UCI to the access network device on an
uplink channel. The UCI includes the channel state information CSI and may include
the HARQ-ACK information.
[0111] Before the access network device feeds back the uplink control information UCI to
the access network device on the uplink channel, the access network device sends the
channel indication information to the terminal device on the physical control channel.
The physical control channel is specifically a physical downlink control channel (Physical
Downlink Control Channel, PDCCH for short) and an enhanced physical downlink control
channel (Enhanced Physical Downlink Control Channel, EPDCCH for short). Information
borne on the physical control channel is dynamically configured information. That
is, the channel indication information is borne on the physical control channel as
dynamically configured information, and is sent by the access network device to the
terminal device.
[0112] Step S402: The access network device preconfigures
N channel resource sets for the terminal device, so that the terminal device determines
a channel resource set of the
N channel resource sets as a first channel resource set, and determines a channel resource
that is in the first channel resource set and that is indicated by the channel indication
information, where
N is a positive integer greater than or equal to 2, and each of the
N channel resource sets includes at least two channel resources.
[0113] In this embodiment of the present invention, step S401 may be performed first and
then step S402 may be performed, or step S402 may be performed first and then step
S401 may be performed. The access network device preconfigures the
N channel resource sets for the terminal device, where
N is a positive integer greater than or equal to 2, and each of the
N channel resource sets includes at least two channel resources. The terminal device
determines a channel resource set of the
N channel resource sets as the first channel resource set. Specifically, determining
the channel resource set of the
N channel resource sets as the first channel resource set may be according to a type
or size of the UCI fed back by the terminal device to the access network device. The
type of the UCI may be specifically distinguished by using specific content included
in the UCI, and the size of the UCI may be specifically measured by using a quantity
of bits of the UCI or an amount of UCI. After the first channel resource set is determined,
the terminal device determines the channel resource that is in the first channel resource
set and that is indicated by the channel indication information. Specifically, the
channel resource indicated by the channel indication information is a channel resource
in the first channel resource set. For example, the first channel resource set includes
four channel resources: a channel resource a, a channel resource b, a channel resource
c, and a channel resource d. It is predefined that channel indication information
00 indicates the channel resource a, channel indication information 01 indicates the
channel resource b, channel indication information 10 indicates the channel resource
c, and channel indication information 11 indicates the channel resource d. According
to an indication of the channel indication information, the channel resource may be
determined in the first channel resource set.
[0114] Step S403: The access network device receives uplink control information UCI sent
by the terminal device on the channel resource.
[0115] The access network device receives the uplink control information UCI sent by the
terminal device on the determined channel resource. That is, the channel resource
is used as the uplink channel to bear the uplink control information UCI.
[0116] In this embodiment of the present invention, the access network device sends configuration
information of the at least two channel resource sets to the terminal device, where
each channel resource set includes at least two channel resources. This is equivalent
to that all channel resources allocated by the access network device to the terminal
device are grouped, and each group is equivalent to one channel resource set. The
terminal device first determines the first channel resource set of the multiple channel
resource sets, and then determines the channel resource in the first channel resource
set according to the channel indication information. Different channel resources may
be determined at different times in a subframe according to same channel indication
information, while in the prior art, only one channel resource can be determined at
different times in a subframe according to same channel indication information. As
a quantity of channel resources increases continuously, a quantity of bits that need
to be added to the channel indication information in this embodiment of the present
invention is less than that in the prior art, reducing consumption of downlink channel
resources by the channel indication information in a delivery process.
[0117] Based on the foregoing embodiment, quantities of channel resources included in the
N channel resource sets are the same. As shown in FIG. 2 and FIG. 3, all the channel
resource sets include a same quantity of channel resources. In addition, all the channel
resource sets may alternatively include different quantities of channel resources.
[0118] At least one of the
N channel resource sets includes at least two channel resources having different formats.
A channel resource set includes channel resources having at least two different formats.
For example, four channel resources in a channel resource set A may have two formats,
three formats, or four formats. A format of the channel resource is shown in FIG.
17. The five formats detailed in the foregoing embodiment are not described herein
again.
[0119] At least one of the
N channel resource sets includes at least two channel resources having a same format
but different channel capacities. For example, a channel resource 1-1 and a channel
resource 1-2 in the channel resource set A have a same format but different channel
capacities.
[0120] The UCI further includes scheduling request information SR.
[0121] Before the sending, by an access network device, channel indication information to
a terminal device on a physical control channel, the method further includes: sending,
by the access network device, configuration information of the
N channel resource sets to the terminal device by using higher layer signaling, where
configuration information of the N channel resource sets corresponding to the different
terminal devices is different.
[0122] Before the sending, by an access network device, channel indication information to
a terminal device on a physical control channel, the access network device sends the
configuration information to the terminal device. The configuration information includes
the
N channel resource sets, and configuration information of the N channel resource sets
corresponding to the different terminal devices is different.
[0123] This embodiment of the present invention specifically provides the method for determining,
by the terminal device according to the type or the size of the UCI, the channel resource
set matching the type or the size of the UCI of the multiple channel resource sets
as the first channel resource set.
[0124] FIG. 5 is a flowchart of an uplink control information sending method. The uplink
control information sending method is provided for a case in which a capacity of an
uplink channel specified by an access network device for the terminal device by using
channel indication information does not meet a size of UCI, leading to relatively
low utilization of the uplink channel or losses of UCI bits. Specific steps of the
method are as follows:
[0125] Step S501: A terminal device receives channel indication information from an access
network device on a physical control channel.
[0126] The terminal device receives, on the physical control channel, the channel indication
information sent by the access network device. The physical control channel is specifically
a physical downlink control channel (Physical Downlink Control Channel, PDCCH for
short) and an enhanced physical downlink control channel (Enhanced Physical Downlink
Control Channel, EPDCCH for short). Information borne on the physical control channel
is dynamically configured information. That is, the channel indication information
is borne on the physical control channel as dynamically configured information, and
is sent by the access network device to the terminal device. The channel indication
information is specifically channel indication information.
[0127] Step S502: The terminal device determines a first channel resource of
N channel resources according to the channel indication information, where
N is a positive integer greater than or equal to 2, and the
N channel resources are preconfigured by the access network device for the terminal
device.
[0128] If the access network device allocates four channel resources to the terminal device,
which are specifically a channel resource a, a channel resource b, a channel resource
c, and a channel resource d, and it is predefined that channel indication information
00 indicates the channel resource a, channel indication information 01 indicates the
channel resource b, channel indication information 10 indicates the channel resource
c, and channel indication information 11 indicates the channel resource d, the first
channel resource may be determined in the four channel resources according to an indication
of the channel indication information. For example, it is determined, according to
the indication of the channel indication information, that the first channel resource
is the channel resource b.
[0129] Step S503: The terminal device increases or decreases the first channel resource
to obtain a second channel resource.
[0130] The
N channel resources correspond to different channel capacities. Before the increasing
or decreasing, by the terminal device, the first channel resource to obtain a second
channel resource, the method further includes: determining, by the terminal device,
a size of the UCI. The increasing or decreasing, by the terminal device, the first
channel resource to obtain a second channel resource includes: if a channel capacity
corresponding to the first channel resource is greater than the size of the UCI, decreasing,
by the terminal device, the first channel resource to obtain the second channel resource;
or if a channel capacity corresponding to the first channel resource is less than
the size of the UCI, increasing, by the terminal device, the first channel resource
to obtain the second channel resource.
[0131] Step S504: The terminal device sends uplink control information UCI to the access
network device on the second channel resource.
[0132] The first channel resource is modified to obtain the second channel resource in step
S503, so that a capacity corresponding to the second channel resource matches the
size of the uplink control information UCI. The terminal device sends the UCI to the
access network device on the second channel resource.
[0133] One of the at least two channel resources is determined as the first channel resource
by using the channel indication information; the first channel resource is increased
or decreased according to capacity information corresponding to the first channel
resource and the size of the uplink control information UCI generated by the terminal
device, to obtain the second channel resource; and the terminal device sends the UCI
to the access network device on the second channel resource, so that a capacity corresponding
to the second channel resource matches the size of the UCI. That is, when the first
channel resource is greater than the size of the uplink control information UCI, the
first channel resource is decreased to increase utilization of the uplink channel;
when the first channel resource is less than the size of the uplink control information
UCI, the first channel resource is increased to prevent discarding of UCI bits.
[0134] FIG. 6 is a schematic diagram of a channel. FIG. 7 is a schematic diagram of a channel
resource. The decreasing, by the terminal device, the first channel resource to obtain
the second channel resource includes: decreasing, by the terminal device, the channel
capacity of the first channel resource by
k basic channel elements to obtain the second channel resource, so that the size
Ra of the UCI meets
Rb- (
k+1)
R0 <
Ra ≤
Rb -kR0, where
Rb indicates the channel capacity of the first channel resource, and
R0 indicates a size of the basic channel element.
[0135] The channel capacity of the first channel resource is represented by
Rb, and the size of the UCI is represented by
Ra. For example, at a time in a subframe n, if the capacity corresponding to the first
channel resource determined by the terminal device by using the channel indication
information is greater than the size of the UCI, that is,
Rb >
Ra, the channel capacity of the first channel resource is decreased. Specifically, the
channel capacity of the first channel resource is in a unit of a basic channel element,
and it is preset that the size of the basic channel element is
R0. A difference between
Rb and
Ra is divided by
R0, and then an obtained result is rounded up to obtain a quantity
k of basic channel elements that need to be subtracted, so that the size
Ra of the UCI meets
Rb-(
k+1)
R0 <
Ra ≤
Rb - kR0. In different subframes, sizes of the UCI are different. Therefore, in different
subframes, different quantities of basic channel elements need to be subtracted from
first channel resources having a same size. For example, at the time in the subframe
n, four basic channel elements need to be subtracted from the first channel resource;
at a time in a subframe m, seven basic channel elements need to be subtracted from
the first channel resource.
[0136] A subcarrier whose frequency is the highest in the
k basic channel elements is adjacent to a subcarrier whose frequency is the lowest
in the first channel resource; or a subcarrier whose frequency is the lowest in the
k basic channel elements is adjacent to a subcarrier whose frequency is the highest
in the first channel resource.
[0137] As shown in FIG. 6, a frequency increases in a direction of an arrow f. Specifically,
the subcarrier whose frequency is the highest in the
k basic channel elements is adjacent to the subcarrier whose frequency is the lowest
in the first channel resource. That is, the first channel resource may be decreased
from a low frequency band of the first channel resource.
[0138] As shown in FIG. 7, a frequency increases in a direction of an arrow f. Specifically,
the subcarrier whose frequency is the lowest in the
k basic channel elements is adjacent to the subcarrier whose frequency is the highest
in the first channel resource. That is, the first channel resource may be decreased
from a high frequency band of the first channel resource.
[0139] FIG. 8 is a schematic diagram of a channel resource. FIG. 9 is a schematic diagram
of a channel resource. This part of the description relating to FIGs. 8, 9 does not
describe part of the claimed/present invention. The increasing, by the terminal device,
the first channel resource to obtain the second channel resource includes: increasing,
by the terminal device, the channel capacity of the first channel resource by
k basic channel elements, so that the size
Ra of the UCI meets
Rb + (
k-1)
R0 <
Ra ≤
Rb +
kR0, where
Rb indicates the channel capacity of the first channel resource, and
R0 indicates a size of the basic channel element.
[0140] The channel capacity of the first channel resource is represented by
Rb, and the size of the UCI is represented by
Ra. For example, at a time in a subframe n, if the capacity corresponding to the first
channel resource determined by the terminal device by using the channel indication
information is less than the size of the UCI, that is,
Rb <
Ra, the channel capacity of the first channel resource is increased. Specifically, the
channel capacity of the first channel resource is in a unit of a basic channel element,
and it is preset that the size of the basic channel element is
R0. A difference between
Ra and
Rb is divided by
R0, and then an obtained result is rounded up to obtain a quantity
k of basic channel elements that need to be added, so that the size
Ra of the UCI meets
Rb + (
k-1)
R0 <
Ra -
Rb +
kR0. In different subframes, sizes of the UCI are different. Therefore, in different
subframes, different quantities of basic channel elements need to be added to first
channel resources having a same size. For example, at the time in the subframe n,
four basic channel elements need to be added to the first channel resource; at a time
in a subframe m, seven basic channel elements need to be added to the first channel
resource.
[0141] A subcarrier whose frequency is the highest in the
k basic channel elements is adjacent to a subcarrier whose frequency is the lowest
in the first channel resource; or a subcarrier whose frequency is the lowest in the
k basic channel elements is adjacent to a subcarrier whose frequency is the highest
in the first channel resource.
[0142] As shown in FIG. 8, a frequency increases in a direction of an arrow f. Specifically,
the subcarrier whose frequency is the highest in the
k basic channel elements is adjacent to the subcarrier whose frequency is the lowest
in the first channel resource. That is, the first channel resource may be increased
from a low frequency band of the first channel resource.
[0143] As shown in FIG. 9, a frequency increases in a direction of an arrow f. Specifically,
the subcarrier whose frequency is the lowest in the
k basic channel elements is adjacent to the subcarrier whose frequency is the highest
in the first channel resource. That is, the first channel resource may be increased
from a high frequency band of the first channel resource.
[0144] The UCI includes at least one of HARQ-ACK information of the terminal device for
received downlink data or channel state information CSI generated by the terminal
device.
[0145] The UCI further includes scheduling request information SR.
[0146] Before the receiving, by a terminal device, channel indication information from an
access network device on a physical control channel, the method further includes:
receiving, by the terminal device, configuration information of the
N channel resources from the access network device by using higher layer signaling,
where configuration information of the N channel resource sets corresponding to the
different terminal devices is different.
[0147] Before the receiving, by a terminal device, channel indication information from an
access network device on a physical control channel, the terminal device further receives
the configuration information sent by the access network device by using higher layer
signaling. The configuration information includes the
N channel resources, and configuration information of the N channel resource sets corresponding
to the different terminal devices is different.
[0148] The first channel resource is increased or decreased in a unit of a basic channel
element, to obtain the second channel resource, so that the capacity corresponding
to the second channel resource matches the size of the UCI. That is, when the first
channel resource is greater than the size of the uplink control information UCI, the
first channel resource is decreased to increase utilization of the uplink channel;
when the first channel resource is less than the size of the uplink control information
UCI, the first channel resource is increased to prevent discarding of UCI bits.
[0149] FIG. 10 is a flowchart of an uplink control information receiving method. The uplink
control information sending method is provided for a case in which a capacity of an
uplink channel specified by an access network device for the terminal device by using
channel indication information does not meet a size of UCI, leading to relatively
low utilization of the uplink channel or discarding of UCI bits. Specific steps of
the method are as follows:
[0150] Step S1001: An access network device sends channel indication information to a terminal
device on a physical control channel, so that the terminal device determines a first
channel resource of
N channel resources according to the channel indication information, and increases
or decreases the first channel resource to obtain a second channel resource, where
N is a positive integer greater than or equal to 2, and the
N channel resources are preconfigured by the access network device for the terminal
device.
[0151] The terminal device receives, on the physical control channel, the channel indication
information sent by the access network device. The physical control channel is specifically
a physical downlink control channel (Physical Downlink Control Channel, PDCCH for
short) and an enhanced physical downlink control channel (Enhanced Physical Downlink
Control Channel, EPDCCH for short). Information borne on the physical control channel
is dynamically configured information. That is, the channel indication information
is borne on the physical control channel as dynamically configured information, and
is sent by the access network device to the terminal device. The channel indication
information is specifically channel indication information. If the access network
device allocates four channel resources to the terminal device, which are specifically
a channel resource a, a channel resource b, a channel resource c, and a channel resource
d, and it is predefined that channel indication information 00 indicates the channel
resource a, channel indication information 01 indicates the channel resource b, channel
indication information 10 indicates the channel resource c, and channel indication
information 11 indicates the channel resource d, the first channel resource may be
determined in the four channel resources according to an indication of the channel
indication information. For example, it is determined, according to the indication
of the channel indication information, that the first channel resource is the channel
resource b. The
N channel resources correspond to different channel capacities. Before the increasing
or decreasing, by the terminal device, the first channel resource to obtain a second
channel resource, the method further includes: determining, by the terminal device,
a size of the UCI. The increasing or decreasing, by the terminal device, the first
channel resource to obtain a second channel resource includes: if a channel capacity
corresponding to the first channel resource is greater than the size of the UCI, decreasing,
by the terminal device, the first channel resource to obtain the second channel resource;
or if a channel capacity corresponding to the first channel resource is less than
the size of the UCI, increasing, by the terminal device, the first channel resource
to obtain the second channel resource.
[0152] Step S1002: The access network device receives uplink control information UCI sent
by the terminal device on the second channel resource.
[0153] The first channel resource is modified to obtain the second channel resource, so
that a capacity corresponding to the second channel resource matches the size of the
uplink control information UCI. The access network device receives the UCI sent by
the terminal device on the second channel resource.
[0154] The UCI includes at least one of HARQ-ACK information of the terminal device for
received downlink data or channel state information CSI generated by the terminal
device.
[0155] The UCI further includes scheduling request information SR.
[0156] Before the sending, by an access network device, channel indication information to
a terminal device on a physical control channel, the method further includes: sending,
by the access network device, configuration information of the
N channel resources to the terminal device by using higher layer signaling, where configuration
information of the N channel resource sets corresponding to the different terminal
devices is different.
[0157] Before the sending, by an access network device, channel indication information to
a terminal device on a physical control channel, the access network device sends the
configuration information to the terminal device by using the higher layer signaling.
The configuration information includes the
N channel resources, and configuration information of the N channel resource sets corresponding
to the different terminal devices is different.
[0158] One of the at least two channel resources is determined as the first channel resource
by using the channel indication information; the first channel resource is increased
or decreased according to capacity information corresponding to the first channel
resource and the size of the uplink control information UCI generated by the terminal
device, to obtain the second channel resource; and the terminal device sends the UCI
to the access network device on the second channel resource, so that a capacity corresponding
to the second channel resource matches the size of the UCI. That is, when the first
channel resource is greater than the size of the uplink control information UCI, the
first channel resource is decreased to increase utilization of the uplink channel;
when the first channel resource is less than the size of the uplink control information
UCI, the first channel resource is increased to prevent discarding of UCI bits.
[0159] FIG. 11 is a structural diagram of a terminal device according to an embodiment of
the present invention. The terminal device provided in this embodiment of the present
invention may perform the processing procedure provided in the embodiment of the uplink
control information sending method. As shown in FIG. 11, the terminal device 110 includes
a first receiving unit 111, a first processing unit 112, and a first sending unit
113. The first receiving unit 111 is configured to receive channel indication information
from an access network device on a physical control channel. The first processing
unit 112 is configured to: determine a channel resource set of
N channel resource sets as a first channel resource set, where
N is a positive integer greater than or equal to 2, the
N channel resource sets are preconfigured by the access network device for the terminal
device, and each of the
N channel resource sets includes at least two channel resources; and determine a channel
resource that is in the first channel resource set and that is indicated by the channel
indication information. The first sending unit 113 is configured to send uplink control
information UCI to the access network device on the channel resource.
[0160] The first processing unit 112 in this embodiment of the present invention may be
implemented by a processor.
[0161] The access network device sends configuration information of the at least two channel
resource sets to the terminal device, where each channel resource set includes at
least two channel resources. This is equivalent to that all channel resources allocated
by the access network device to the terminal device are grouped, and each group is
equivalent to one channel resource set. The terminal device first determines the first
channel resource set of the multiple channel resource sets, and then determines the
channel resource in the first channel resource set according to the channel indication
information. Different channel resources may be determined at different times in a
subframe according to same channel indication information, while in the prior art,
only one channel resource can be determined at different times in a subframe according
to same channel indication information. As a quantity of channel resources increases
continuously, a quantity of bits that need to be added to the channel indication information
in this embodiment of the present invention is less than that in the prior art, reducing
consumption of downlink channel resources by the channel indication information in
a delivery process.
[0162] In what is not considered to be part of the claimed/present invention, first processing
unit 112 is further configured to determine a type of the UCI. The first processing
unit 112 is specifically configured to determine the channel resource set that is
of the
N channel resource sets and that matches the type of the UCI as the first channel resource
set.
[0163] In what is not considered to be part of the claimed/present invention, the type of
the UCI includes a first type and a second type, and
N = 2. A first type of UCI includes channel state information CSI and hybrid automatic
repeat request-acknowledgment HARQ-ACK information, and a channel resource included
in one of the
N channel resource sets is used to send the first type of UCI. A second type of UCI
includes HARQ-ACK information but not CSI, and a channel resource included in the
other of the
N channel resource sets is used to send the second type of UCI.
[0164] The first processing unit 112 is further configured to determine a size of the UCI.
The first processing unit 112 is specifically configured to determine the channel
resource set that is of the
N channel resource sets and that matches the size K of the UCI as the first channel
resource set.
[0165] The first processing unit 112 is specifically configured to: determine a capacity
range corresponding to each of the
N channel resource sets; and determine a channel resource set of the
N channel resource sets as the first channel resource set, so that the size K of the
UCI meets R
min ≤
K ≤
Rmax, where a capacity range of the channel resource set is [
Rmin,
Rmax], R
min is a minimum value of a capacity of the channel resource set, and
Rmax is a maximum value of the capacity of the channel resource set.
[0166] Quantities of channel resources included in the
N channel resource sets are the same.
[0167] At least one of the
N channel resource sets includes at least two channel resources having different formats.
[0168] Alternatively, at least one of the
N channel resource sets includes at least two channel resources having a same format
but different channel capacities.
[0169] The first receiving unit 111 is further configured to receive configuration information
of the
N channel resource sets from the access network device by using higher layer signaling,
where configuration information of the N channel resource sets corresponding to the
different terminal devices is different.
[0170] The first processing unit 112 in this embodiment of the present invention may be
implemented by a processor.
[0171] The terminal device provided in this embodiment of the present invention may be specifically
configured to perform the method embodiment provided in FIG. 1. Specific functions
are not described herein again.
[0172] This embodiment of the present invention specifically provides a method for determining,
by the terminal device according to the type or the size of the UCI, the channel resource
set matching the type or the size of the UCI of the multiple channel resource sets
as the first channel resource set.
[0173] FIG. 12 is a structural diagram of an access network device according to an embodiment
of the present invention. The access network device provided in this embodiment of
the present invention may perform the processing procedure provided in the embodiment
of the uplink control information sending method. As shown in FIG. 12, the access
network device 120 includes a second sending unit 121, a second processing unit 122,
and a second receiving unit 123. The second sending unit 121 is configured to send
channel indication information to a terminal device on a physical control channel.
The second processing unit 122 is configured to preconfigure
N channel resource sets for the terminal device, so that the terminal device determines
a channel resource set of the
N channel resource sets as a first channel resource set, and determines a channel resource
that is in the first channel resource set and that is indicated by the channel indication
information, where
N is a positive integer greater than or equal to 2, and each of the
N channel resource sets includes at least two channel resources. The second receiving
unit 123 is configured to receive uplink control information UCI sent by the terminal
device on the channel resource.
[0174] The second processing unit 122 in this embodiment of the present invention may be
implemented by a processor.
[0175] In this embodiment of the present invention, the access network device sends configuration
information of the at least two channel resource sets to the terminal device, where
each channel resource set includes at least two channel resources. This is equivalent
to that all channel resources allocated by the access network device to the terminal
device are grouped, and each group is equivalent to one channel resource set. The
terminal device first determines the first channel resource set of the multiple channel
resource sets, and then determines the channel resource in the first channel resource
set according to the channel indication information. Different channel resources may
be determined at different times in a subframe according to same channel indication
information, while in the prior art, only one channel resource can be determined at
different times in a subframe according to same channel indication information. As
a quantity of channel resources increases continuously, a quantity of bits that need
to be added to the channel indication information in this embodiment of the present
invention is less than that in the prior art, reducing consumption of downlink channel
resources by the channel indication information in a delivery process.
[0176] Based on the foregoing embodiment, quantities of channel resources included in the
N channel resource sets are the same.
[0177] At least one of the
N channel resource sets includes at least two channel resources having different formats.
[0178] Alternatively, at least one of the
N channel resource sets includes at least two channel resources having a same format
but different channel capacities.
[0179] The second sending unit 121 is further configured to send configuration information
of the
N channel resource sets to the terminal device by using higher layer signaling, where
configuration information of the N channel resource sets corresponding to the different
terminal devices is different.
[0180] The access network device provided in this embodiment of the present invention may
be specifically configured to perform the method embodiment provided in FIG. 4. Specific
functions are not described herein again.
[0181] This embodiment of the present invention specifically provides a method for determining,
by the terminal device according to the type or the size of the UCI, the channel resource
set matching the type or the size of the UCI of the multiple channel resource sets
as the first channel resource set.
[0182] FIG. 13 is a structural diagram of a terminal device. The terminal device may perform
the processing procedure provided in the uplink control information sending method.
As shown in FIG. 13, the terminal device 130 includes a third receiving unit 131,
a third processing unit 132, and a third sending unit 133. The third receiving unit
131 is configured to receive channel indication information from an access network
device on a physical control channel. The third processing unit 132 is configured
to: determine a first channel resource of
N channel resources according to the channel indication information, where
N is a positive integer greater than or equal to 2, and the
N channel resources are preconfigured by the access network device for the terminal
device; and increase or decrease the first channel resource to obtain a second channel
resource. The third sending unit 133 is configured to send uplink control information
UCI to the access network device on the second channel resource.
[0183] The third processing unit 132 may be implemented by a processor.
[0184] One of the at least two channel resources is determined as the first channel resource
by using the channel indication information; the first channel resource is increased
or decreased according to capacity information corresponding to the first channel
resource and the size of the uplink control information UCI generated by the terminal
device, to obtain the second channel resource; and the terminal device sends the UCI
to the access network device on the second channel resource, so that a capacity corresponding
to the second channel resource matches the size of the UCI. That is, when the first
channel resource is greater than the size of the uplink control information UCI, the
first channel resource is decreased to increase utilization of the uplink channel;
when the first channel resource is less than the size of the uplink control information
UCI, the first channel resource is increased to prevent discarding of UCI bits.
[0185] The
N channel resources correspond to different channel capacities. The third processing
unit 132 is further configured to determine a size of the UCI. The third processing
unit 132 is specifically configured to: if a channel capacity corresponding to the
first channel resource is greater than the size of the UCI, decrease the first channel
resource to obtain the second channel resource; or if a channel capacity corresponding
to the first channel resource is less than the size of the UCI, increase the first
channel resource to obtain the second channel resource.
[0186] The third processing unit 132 is specifically configured to decrease the channel
capacity of the first channel resource by
k basic channel elements to obtain the second channel resource, so that the size
Ra of the UCI meets
Rb-(
k+1)
R0 <
Ra ≤ Rb- kR0, where
Rb indicates the channel capacity of the first channel resource, and
R0 indicates a size of the basic channel element.
[0187] A subcarrier whose frequency is the highest in the
k basic channel elements is adjacent to a subcarrier whose frequency is the lowest
in the first channel resource; or a subcarrier whose frequency is the lowest in the
k basic channel elements is adjacent to a subcarrier whose frequency is the highest
in the first channel resource.
[0188] The third processing unit 132 is specifically configured to increase the channel
capacity of the first channel resource by
k basic channel elements, so that the size
Ra of the UCI meets
Rb + (
k-1)
R0 <
Ra ≤
Rb +
kR0, where
Rb indicates the channel capacity of the first channel resource, and
R0 indicates a size of the basic channel element.
[0189] A subcarrier whose frequency is the highest in the
k basic channel elements is adjacent to a subcarrier whose frequency is the lowest
in the first channel resource; or a subcarrier whose frequency is the lowest in the
k basic channel elements is adjacent to a subcarrier whose frequency is the highest
in the first channel resource.
[0190] The UCI includes at least one of HARQ-ACK information of the terminal device for
received downlink data or channel state information CSI generated by the terminal
device.
[0191] The third receiving unit 131 is further configured to receive configuration information
of the
N channel resources from the access network device by using higher layer signaling,
where configuration information of the N channel resource sets corresponding to the
different terminal devices is different.
[0192] The third processing unit 132 in this embodiment of the present invention may be
implemented by a processor.
[0193] The terminal device may be specifically configured to perform the method embodiment
provided in FIG. 5. Specific functions are not described herein again.
[0194] The first channel resource is increased or decreased in a unit of a basic channel
element, to obtain the second channel resource, so that the capacity corresponding
to the second channel resource matches the size of the UCI. That is, when the first
channel resource is greater than the size of the uplink control information UCI, the
first channel resource is decreased to increase utilization of the uplink channel;
when the first channel resource is less than the size of the uplink control information
UCI, the first channel resource is increased to prevent discarding of UCI bits.
[0195] FIG. 14 is a structural diagram of an access network device. The access network device
provided in this embodiment of the present invention may perform the processing procedure
provided in the embodiment of the uplink control information sending method. As shown
in FIG. 14, the access network device 140 includes a fourth sending unit 141 and a
fourth receiving unit 142. The fourth sending unit 141 is configured to send channel
indication information to a terminal device on a physical control channel, so that
the terminal device determines a first channel resource of
N channel resources according to the channel indication information, and increases
or decreases the first channel resource to obtain a second channel resource, where
N is a positive integer greater than or equal to 2, and the
N channel resources are preconfigured by the access network device for the terminal
device. The fourth receiving unit 142 is configured to receive uplink control information
UCI sent by the terminal device on the second channel resource.
[0196] The first channel resource is increased or decreased in a unit of a basic channel
element, to obtain the second channel resource, so that the capacity corresponding
to the second channel resource matches the size of the UCI. That is, when the first
channel resource is greater than the size of the uplink control information UCI, the
first channel resource is decreased to increase utilization of the uplink channel;
when the first channel resource is less than the size of the uplink control information
UCI, the first channel resource is increased to prevent discarding of UCI bits.
[0197] The UCI includes at least one of HARQ-ACK information of the terminal device for
received downlink data or channel state information CSI generated by the terminal
device.
[0198] The UCI further includes scheduling request information SR.
[0199] The fourth sending unit 141 is further configured to send configuration information
of the
N channel resources to the terminal device by using higher layer signaling, where configuration
information of the N channel resource sets corresponding to the different terminal
devices is different.
[0200] The access network may be specifically configured to perform the method provided
in FIG. 10. Specific functions are not described herein again.
[0201] One of the at least two channel resources is determined as the first channel resource
by using the channel indication information; the first channel resource is increased
or decreased according to capacity information corresponding to the first channel
resource and the size of the uplink control information UCI generated by the terminal
device, to obtain the second channel resource; and the terminal device sends the UCI
to the access network device on the second channel resource, so that a capacity corresponding
to the second channel resource matches the size of the UCI. That is, when the first
channel resource is greater than the size of the uplink control information UCI, the
first channel resource is decreased to increase utilization of the uplink channel;
when the first channel resource is less than the size of the uplink control information
UCI, the first channel resource is increased to prevent discarding of UCI bits.
[0202] FIG. 15 is a structural diagram of an uplink control information sending and receiving
system according to an embodiment of the present invention. The uplink control information
sending and receiving system provided in this embodiment of the present invention
may perform the processing procedures provided in the embodiments of the uplink control
information sending method and the uplink control information receiving method. As
shown in FIG. 15, the uplink control information sending and receiving system 150
includes the terminal device 110 and the access network device 120 in the foregoing
embodiments.
[0203] The uplink control information sending and receiving system provided in this embodiment
of the present invention may perform the processing procedures provided in the embodiments
of the uplink control information sending method and the uplink control information
receiving method.
[0204] FIG. 16 is a structural diagram of an uplink control information sending and receiving
system according to another embodiment of the present invention. The uplink control
information sending and receiving system may perform the processing procedures provided
in the embodiments of the uplink control information sending method and the uplink
control information receiving method. As shown in FIG. 16, the uplink control information
sending and receiving system 160 includes the terminal device 130 and the access network
device 140 in the foregoing embodiments.
[0205] The uplink control information sending and receiving system may perform the processing
of the uplink control information sending method and the uplink control information
receiving method.
[0206] In conclusion, are provided the method for determining, by the terminal device according
to the type or the size of the UCI, the channel resource set matching the type or
the size of the UCI of the multiple channel resource sets as the first channel resource
set, and specifically provide the method for determining, by the terminal device according
to the type or the size of the UCI, a channel resource set matching the type or the
size of the UCI of multiple channel resource sets as the first channel resource set:
One of the at least two channel resources is determined as the first channel resource
by using the channel indication information; the first channel resource is increased
or decreased according to capacity information corresponding to the first channel
resource and the size of the uplink control information UCI generated by the terminal
device, to obtain the second channel resource; and the terminal device sends the UCI
to the access network device on the second channel resource, so that a capacity corresponding
to the second channel resource matches the size of the UCI. That is, when the first
channel resource is greater than the size of the uplink control information UCI, the
first channel resource is decreased to increase utilization of the uplink channel;
when the first channel resource is less than the size of the uplink control information
UCI, the first channel resource is increased to prevent discarding of UCI bits.
[0207] It should be understood that the disclosed apparatus and method may be implemented
in other manners. For example, the unit division is merely logical function division
and may be other division in actual implementation. For example, a plurality of units
or components may be combined or integrated into another system, or some features
may be omitted or not performed. In addition, the displayed or discussed mutual couplings
or direct couplings or communication connections may be indirect couplings or communication
connections between some interfaces, apparatuses, and units, or may be implemented
in electronic, mechanical, or other forms.
[0208] The units described as separate parts may or may not be physically separate, and
parts displayed as units may or may not be physical units, may be located in one position,
or may be distributed on a plurality of network units. Some or all of the units may
be selected according to actual requirements to achieve the objectives of the solutions
of the embodiments.
[0209] In addition, functional units in the embodiments of the present invention may be
integrated into one processing unit, or each of the units may exist alone physically,
or two or more units may be integrated into one unit. The integrated unit may be implemented
in a form of hardware, or may be implemented in a form of hardware in addition to
a software functional unit.
[0210] When the foregoing integrated unit is implemented in a form of a software functional
unit, the integrated unit may be stored in a computer-readable storage medium. The
software functional unit is stored in a storage medium and includes several instructions
for instructing a computer device (which may be a personal computer, a server, a network
device, or the like) or a processor to perform some of the steps of the methods described
in the embodiments of the present invention. The foregoing storage medium includes
any medium that can store program code, such as a USB flash drive, a removable hard
disk, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access
Memory, RAM), a magnetic disk, or an optical disc.
[0211] It may be clearly understood by persons skilled in the art that, for the purpose
of convenient and brief description, division of the foregoing function modules is
taken as an example for illustration. In actual application, the foregoing functions
can be allocated to different function modules and implemented according to a requirement,
that is, an inner structure of an apparatus is divided into different function modules
to implement all or part of the functions described above. For a detailed working
process of the foregoing apparatus, refer to a corresponding process in the foregoing
method embodiments, and details are not described herein again.
[0212] Finally, it should be noted that the foregoing is merely intended to describe the
technical solutions of the present invention, but not to limit the present invention.
Although the present invention is described in detail with reference to the foregoing
embodiments, persons of ordinary skill in the art should understand that they may
still make modifications to the technical solutions described in the foregoing embodiments
or make equivalent replacements to some or all technical features thereof, without
departing from the scope of the appended claims.